[link|http://www.guardian.co.uk/spain/article/0,2763,883074,00.html|Come to think of it, it makes sense]

Excerpt:

The cells, built in 1938 and reportedly hidden from foreign journalists who visited the makeshift jails on Vallmajor and Saragossa streets, were as inspired by ideas of geometric abstraction and surrealism as they were by avant garde art theories on the psychological properties of colours.

Beds were placed at a 20 degree angle, making them near-impossible to sleep on, and the floors of the 6ft by 3ft cells was scattered with bricks and other geometric blocks to prevent prisoners from walking backwards and forwards, according to the account of Laurencic's trial.

The only option left to prisoners was staring at the walls, which were curved and covered with mind-altering patterns of cubes, squares, straight lines and spirals which utilised tricks of colour, perspective and scale to cause mental confusion and distress.

Lighting effects gave the impression that the dizzying patterns on the wall were moving.

A stone bench was similarly designed to send a prisoner sliding to the floor when he or she sat down, Mr Milicua said. Some cells were painted with tar so that they would warm up in the sun and produce asphyxiating heat.

Laurencic told the military court that he had been commissioned to build the cells by an anarchist leader who had heard of similar ones used elsewhere in the republican zone during the civil war, possibly in Valencia.

Mr Milicua has claimed that Laurencic preferred to use the colour green because, according to his theory of the psychological effects of various colours, it produced melancholy and sadness in prisoners.

But it appears that Barcelona was not the only place where avant garde art was used to torture Franco's supporters.

According to the prosecutors who put Laurencic on trial in 1939, a jail in Murcia in south-east Spain forced prisoners to view the infamously disturbing scene from Dali and Bunuel's film Un Chien Andalou, in which an eyeball is sliced open.

El Pais commented: "The avant garde forms of the moment - surrealism and geometric abstraction - were thus used for the aim of committing psychological torture.